Sawmill set-works.



No. 740,477. I L PATENTBD 0GT.6, 1902;.

J. SGHERER.

SAWMILL SET WORKS.

, APPLICATION FILED AUG. 21, 1902. N0 MODEL. 2 SHEETS-SHEET 1- THE'NbRWSPETERS e07, rqo'roumun WASHINGYON. u. c.

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PATENTED OCT. 6, 1903'.

J. SGEERER.

SAWMILL SET WORKS.

APPLICATION FILED AUG. 21, 1902- N0 MODEL 4 2 SHEETS-SHEE'I 2.

was mums vans ca1 wm'm.iwa. WASHING? Patented October 6, 1903.

JOHN SCHERER, OF MARINETTE, WISCONSIN.

SAWM ILL SET-WORKS.

SPECIFICATION formingpart of Letters Patent N 0. 740,477, dated October6, 1903- Application filed August 21, 1902. Serial No, 120,437. (Nomodel.)

To all whom, it may concern:

Be it known that I, JOHN SCHERER, of Marinette, Marinette county, Stateof Wisconsin,

haveinvented new and useful Improvements in Sawmill SetWorks, of whichthe following is a description, reference being had to the accompanyingdrawings, which are a part of this specification.

Heretofore set-works of a class to which my invention is especiallyapplicable have been operated by hand with considerable labor and moreor less unsatisfactory results.

My invention relates to improved means for operating the set-works,including means for applying a motive agent, advisably steam orcompressed air, thereto and means for regulatingand oontrolling'themovements thereof.

The invention consists of the mechanism herein described and claimed orthe equivalent thereof.

In the drawings, Figure 1 is a plan of a fragment of a sawmill-carriagewith set-works thereon having my improved mechanism therewith, someparts being in section for desirable illustration. Fig. 2 is an end viewof an improved means for applying a motive agent to the set-works, partsbeing in section. Fig. 3 is an elevation of a fragment of the cylinderfor steam or other motive agent and the means for admitting the steam tothe cylinder, parts being shown in section. Fig. a is a section of thecase of the induction-valve, the valve being shown in position in thecase. Fig. 5 isan end view of the cylinder, the head being removed,showing the interior and the piston therein. Fig. 6 is a centrallongitudinal section of the cylinder with its head re moved, showing thestationary abutment or partitions and the piston in elevation. Fig. 7 isa transverse section of my improved controller employed to regulate andcontrol the movements of the set-works, the section being on line 7 70fFig. 8; and Fig. 8 is a longitudinal section of the controller.

My improved devices are especially adapted to be employed with set-workssubstantially like those for which Letters Patent No. 679,037 wasissuedto me on July 23, 1901, and in the drawings accompanying thisapplication I have illustratedset-works that in.

general form are substantially like those shown and described in thatpatent.

- necessary.

In the drawings, A represents a fragment of a sawmill-carriage providedwith headblocks B, adapted for the support and travel of knees thereon.A set-shaft 3 has its bearings on the carriage and is provided withpinions 4, adapted to mesh with racks on the knees and by its rotationserving to move the knees forward and back. .A rock-shaft 5 is alsomounted on the carriage and is provided with radial arms on which pawls6 6 are mounted, these pawls being disposed to engagea ratchet-wheel 7,tight on the set-shaft 3. The construction is such that by the movementofthe shaft 5 in either direction the shaft 3 is correspondingly rotatedin one andthe same direction. Devices 8 are provided for liftingthepawls- 6 6 to permit the shaft 3 to be rotated reversely forreturning the knees to initial positions. A friction-brake 9 is providedfor controlling limitedly the movement of the shaft 3, A pinion 10 onshaft 3 meshes with the toothed wheel 11,

having rigid and concentric therewith a disk 12, mounted on a pin fixedin the arm of segment-rack 13, rigid on the carriage.

The periphery ofthe disk is provided with a graduated and numberedscale, and a finger 14,

rigid on the arm of rack 13, serves as an infixed on the rock-shaft 5,is so disposed that it rests normally against a stop 18 on the arm ofthe rack 12 and is adapted when the rockshaft is oscillated to swingover to and be stopped bycontact with the arm 15,setin a predeterminedposition with relation to the stop 18 by the engagement of the latch 16with the rack 13. This construction is adapted to adjustably limit theoscillating movement of the rock-shaft. The rock-shaft is advisablyprovided with a separable clutch 19, whereby that portion of the shaftat the left of this clutch in Fig. 1 can be detached therefrom if at anytime it is desired to operate the setworks by hand.

For applying a motive agent, as steam or compressed air, to therock-shaft 5 for thereby operating the set-works I provide a cylinder20, mounted on the carriage in the axial line of the rock-shaft and intowhich the rock-shaft extends through a stuffing-box 21. The cylinder isprovided with longitudinal oppositely-disposed fixed abutments orpartitions 22 22, which extend inwardly from the cylinder to the hub ofthe revoluble piston 23, fixed on'the shaft 5, thereby dividing thecylinder into two chambers. The radiallydisposed blades 24 24 of thepiston fit to the wall and heads of the cylinder and may swing in thechambers from one abutment 22 to the other abutment 22 under the actionof the fluid motive agent. The extent of the oscillations of the pistonwill be controlled by the movement permitted in the arm 17, the arm 17'always starting from its home position against the stop 18 and theblades 24 always starting from a corresponding home position against orclose to their abutments 22. The blades 24 are advisably provided withpacking 25 25 in their outer edges.

For introducing and discharging the motive agent to and from thecylinder for actuating the piston and rotating the rock-shaft I provideimproved means consisting of a valvecase 26, provided with aninduction-duct 27 and an eduction-duct 28 and a plug-valve 29,reciprocable endwise in the valve-case. The valve-case is closed by adetachable cap 30 at one end and by a detachable stuffing-box 31 at theother end. The valve is provided with a central chamber and with twoannular grooves 32 and 33 for the passage of steam and'with front andrear valve-ports 34 35, leading from the grooves respectively into thevalve-chamber. Ducts 36 36 and 37 37 lead from the valve-case throughthe head of the cylinder 20 to the cylinder-chambers, these ducts beingso arranged that the ducts 36 36 discharge steam into the two chambersof the cylinder, but on the opposite sides of the two blades of thepiston at opposite sides of the axis, and the ducts 37 37 dischargesteam also into the two chambers of the cylinder on opposite sides ofthe two blades of the piston and at sides of the axis of the piston andalso on the reverse sides of the blades to those sides at which steam isdischarged through the ducts 36 and 36 The induction-duct 27 is locatedmedially of the valve-case, and the grooves 32 33 about the valve are sodisposed that the induction-duct is closed when the valve is in theposition shown in Fig. 2 and will be openv to the valve-chamberwhen thevalve is shifted either to the left or to the right, so as at the sametime to bring the port 34 into registration with the ducts 36 36 or theport 35 into registration with the ducts 37 37 The eduction-duct 28 isprovided with branches 28 and 28", whereby it leads to the chamber inthe valve-case at the left and right of the ends of the valve when it islocated as shown in Figs. 2 and 4. It will be understood that when thevalve is shifted so as to bring the port 34into registration with theducts 36 36 the ducts 37 37 will be open into the chamber of thevalve-casing and to the eductionduct 28. The valve 29 is provided with astem 38, pivoted in the outer end of a radial arm 39 of the rock-shaft40, which rock-shaft is mounted on the carriage and is provided With aradial hand-lever 41, by which the attendant can shift the valve asdesired.

By the construction just described steam or any fluid motive agent maybe employed for rotating the rock-shaft of the set-works, and asconsiderable power is required for rotating this shaft it has been foundexceedingly valuable to have the power applied on radial arms at bothsides of the axis of the shaft in opposite direction, whereby the strainof oscillating the shaft is balanced and the movement is steady andreliable.

For regulating the oscillatory movements of the rock-shaft 5, wherebyrapidity of movement and strain of shock will be prevented, I provide acontroller 42, which consists of a cylinder 43, secured in position onthe carriage and located in the axial line of the shaft 5. The shaftextends through a stuffing-box 44 into the cylinder and is provided withradially-disposed wings 45 45, tight on the shaft and projectingtherefrom in opposite directions and fitting in and dividing the chamberof the cylinder into substantially equal parts. In the cylinder Iprovide partition-blocks 46 46, located on opposite sides of the chamberand projecting from the wall of the cylinder inwardly throughout itslength to and fitting against the curved surface of the hub of thewings. By this means the chamber of the cylinder is divided permanentlyinto two chambers, which are filled with water, oil, alcohol, or someequivalent fluid. The wings 45 45 are located one in each of thesesegmental chambers and are adapted to oscillate forward and back in thechambers. To permit of a limited flow only'of the liquid in the chambersfrom one chamber to another, I provide a passage 47 through each ofthese partitionblocks 46 from one chamber to the other, and for reducingthe size of these passages I provide screw-threaded plugs or. shut-offs48 48, which are adjustable in the cylinder and the outer portions ofthe partition-blocks into the passages 47, whereby they can be reducedin capacity to such extent as may be desired. By this construction whenthe cylinder is filled with a controlling fluid the oscillatory movementof the shaft 5 can be obstructed and -that would otherwise occur underthe admis sion of steam to the cylinder 20 for oscillating therock-shaft.

What I claim as my invention is 1. In sawmill set-works,-the combinationwith a rock-shaft adapted by its oscillation to a predetermined extentto correspondingly move mill-knees, of means for applying a fluid motiveagent directly to the rock-shaft at 0pposite sides of its axis forrotating it limitedly and without unbalanced side strain com prisingchambers on opposite sides of the shaft adapted to take such fluidmotive agent concurrently, and blades attached to the shaft at oppositesides thereof adapted to be actuated concurrently in opposite directionsby said fluid motive agent.

2. In set-works, a rock shaft, a steam-cylinder into which theshaftprojects, stationary abutment-partitions in the cylinder, radial bladeson the shaft at opposite sides thereof in respective segmental chambersofthe cylinder, and means for admitting the fluid motive agent to thechamber simultaneously on corresponding sides of. the radially-disposedblades. 7

3. In set-works, a rock-shaft, a steam-cylinderinto which the shaftprojects, stationary abutment-partitions in the cylinder, radial bladeson the shaft at opposite sides thereof in respective segmental chambersof the cyl-- inder, and a reciprocable valve having induction andeduction passages whereby a fluid motive agent may be introduced intothe cylinder at opposite sides of the shaft and against correspondingsides of the blades.

4. In set-works, a rock-shaft, a steam-cylinder into which the shaftextends, blades on the shaft projecting radially therefrom and fittingsteam-tight in the cylinder, abutmentpartitions fixed in the cylinderdividing it into chambers having a blade in each chamher and means foradmitting avfiuid motive agent into the chamber on corresponding sidesof the oppositely-disposed blades.

5. In sawmillset-Works, means for admitting a fluid motive agent to acylinder on corresponding sides of radially-disposed oscillating blades,comprising a valve provided with induction and eduction ducts, aslidable plug-valve having a central chamber, exterior annular groovesand. valve-ports openin g from the grooves into the valve-chamber,

the steam-ducts leading from the valve-case

